<local:CategoryViewModel 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"       
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:MendeleyClient.Phone" 
    SampleProperty="Sample Text Property Value">

    <local:CategoryViewModel.Items>
        <local:CategoryItemViewModel Id="1" Name="design one" Slug="Dictumst eleifend facilisi faucibus" />
        <local:CategoryItemViewModel Id="2" Name="design two" Slug="Dictumst eleifend facilisi faucibus" />
        <local:CategoryItemViewModel Id="3" Name="design three" Slug="Dictumst eleifend facilisi faucibus" />
        <local:CategoryItemViewModel Id="4" Name="design four" Slug="Dictumst eleifend facilisi faucibus" />
    </local:CategoryViewModel.Items>
    
</local:CategoryViewModel>